CVE-2023-6209
6.5
MEDIUM
CVSS 3.1
EPSS 0.38%
Description
Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
How to fix CVE-2023-6209
To remediate CVE-2023-6209, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 115.5.0esr-1~deb11u1 or later
- —upgrade to 1:115.5.0-1~deb11u1 or later
Is CVE-2023-6209 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 115.5.0esr-1~deb11u1
- from 0, < 1:115.5.0-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |